Systems and methods for controlling a level of interference to a wireless receiver responsive to an activity factor associated with a wireless transmitter

Abstract

A level of interference to a wireless receiver may be controlled by determining a set of frequencies to be assigned to a wireless transmitter, responsive to an activity factor associated with the wireless transmitter, other than a transmission power level of the wireless transmitter. The set of frequencies is then assigned to the wireless transmitter. Related systems, methods and devices are also described.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of Provisional Application No. 60 / 744,775, filed Apr. 13, 2006, entitled Systems and Methods for Controlling Transmission Frequencies of Outdoor Radioterminals to Reduce Potential Interference With Other Outdoor Radioterminals and Provisional Application No. 60 / 800,815, filed May 16, 2006, entitled Systems and Methods for Controlling Transmission Frequencies of Radioterminals to Reduce Potential Interference With Other Radioterminals, assigned to the assignee of the present invention, the disclosures of which are hereby incorporated hereby by reference in their entirety as if set forth fully herein.FIELD OF THE INVENTION [0002] This invention relates to wireless communications systems, methods and components thereof and more particularly to satellite and terrestrial wireless communications systems, methods and components thereof. BACKGROUND OF THE INVENTION [0003] Satellite radiotelephone communicatio...

AI Technical Summary

Benefits of technology

[0023] In still other embodiments of the present invention, out-of-channel emissions by a first satellite band radioterminal of a first radioterminal system into a second satellite band of a second radioterminal system may be reduced, according to some embodiments of the present invention, by selecting at least one parameter of the first satellite band transmission by the first radioterminal, other than a power level of the first satellite band transmission by the first radioterminal, as a function of the power level of the first satellite band transmission by the first radioterminal and a transmission frequency of the first satellite band transmission by the first radioterminal relative to the second satellite band of the second radioterminal system. In some embodiments, at least one parameter of the first satellite transmission by a first radioterminal, other than a power level of the first satellite band transmission by the first radioterminal, is selected as a function of the power level of the first satellite band transmission by the first radioterminal being sufficiently high, and a transmission frequency of the first satellite band transmission by the first radioterminal being sufficiently close to the second satellite band of the second radioterminal system, so as to produce an undesirable level of out-of-channel emissions by the first radioterminal of the first radioterminal system into the second satellite band of the second satellite radioterminal system.

[0025] In still other embodiments, the transmission frequency of the first satellite band transmission by the first transmission terminal is changed to be further away from the second satellite band of the second radioterminal system, to thereby increase the size of the guardband between the first satellite band transmission of the first radioterminal and the second satellite band of the second radioterminal system, as a function of the increase in power level of the first satellite band transmission by the first radioterminal. In other embodiments, the transmission frequency of the first satellite band transmission by the first radioterminal is changed to be closer to the second satellite band of the second radioterminal system, to thereby decrease the size of the guardband between the first satellite band transmission of the first radioterminal and the second satellite band of the second radioterminal system, as a function of the decreasing power level of the first satellite band transmission by the first radioterminal.

Problems solved by technology

In particular, it is known that it may be difficult for cellular satellite radiotelephone systems to reliably serve densely populated areas, because satellite signals may be blocked by high-rise structures and / or may not penetrate into buildings.

As a result, satellite spectrum may be underutilized or unutilized in such areas.

Conventional dual band / dual mode radiotelephone alternatives, such as the well known Thuraya, Iridium and / or Globalstar dual mode satellite / terrestrial radiotelephones, duplicate some components (as a result of the different frequency bands and / or air interface protocols between satellite and terrestrial communications), which leads to increased cost, size and / or weight of the radiotelephone.

However, inter-system interference also can be caused by terrestrial use and / or reuse of satellite frequencies by an ancillary terrestrial network and / or radioterminals communicating therewith, due to, for example, the potential production of out-of-band and / or out-of-channel emissions by a radioterminal that is transmitting over a satellite frequency band.

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